399774 (2005 NB7)

Small Apollo-class Asteroid

Near-Earth Potentially Hazardous
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Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to the Golden Gate Bridge
  • Will pass within 4,395,422 km of Earth in 2046
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

399774 (2005 NB7) is a small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2005 NB7 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

2005 NB7 orbits the sun every 1,070 days (2.93 years), coming as close as 0.98 AU and reaching as far as 3.10 AU from the sun. Based on its brightness and the way it reflects light, 2005 NB7 is probably between 0.462 to 1.033 kilometers in diameter, making it larger than ~97% of asteroids but small compared to large asteroids, very roughly comparable in size to the Golden Gate Bridge.

The rotation of 2005 NB7 has been observed. It completes a rotation on its axis every 3.49 hours.

Close Approaches

2005 NB7's orbit is 0.01 AU from Earth's orbit at its closest point. This means that there is a wide berth between this asteroid and Earth at all times.

2005 NB7 has 5 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
April 15, 2046 4,395,422 10.585
April 30, 2093 22,984,855 12.685
March 18, 2096 16,625,984 10.382
April 16, 2164 10,347,298 9.996
March 31, 2167 11,188,141 9.362

Images and Observations

2005 NB7's orbit is determined by observations dating back to Dec. 18, 2001. It was last officially observed on July 14, 2023. The IAU Minor Planet Center records 922 observations used to determine its orbit.

Accessibility and Exploration

This asteroid is not considered a viable target for human exploration by the NHATS study.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2005 NB7:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 2.043 AU
  • Eccentricity: 0.5179
  • Inclination: 12.71°
  • Longitude of Ascending Node: 199.16°
  • Argument of Periapsis: 348.17°
  • Mean Anomaly: 102.66°

Physical Characteristics

  • Diameter: ~0.596 km
  • Magnitude: 18.8

Derived Characteristics

  • Orbit Period: 1,070 days (2.93 years)
  • Avg. Orbit Speed: 20.77 km/s
  • Aphelion Distance: 3.10 AU
  • Perihelion Distance: 0.98 AU
  • Rotation Period: 3.49 hours

Map Comparison

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Orbit Simulation

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Sky Map

The position of 399774 (2005 NB7) is indicated by a ◯ pink circle. Note that the object may not be in your current field of view. Use the controls below to adjust position, location, and time.

Size Rendering

The above comparison is an artistic rendering that uses available data on the diameter of 2005 NB7 to create an approximate landscape rendering with Mount Everest in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.